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The fallout comes in the wake of a deal with the Federal Election Commission in which Guinta admitted accepting campaign contributions in 2010 in excess of the legal limit from an account held in his parents' names.

U.S. Sen. Kelly Ayotte and other-high ranking Republicans in the state said Monday it's time for Guinta to step down."This is a decision he needs to make, but if I were in his position, that's what I would do," Ayotte said.

She said she made the recommendation to Guinta by phone over the weekend.

"I told him that this is what I believe is the right step to do," she said. "Obviously, he needs to fully account to people in New Hampshire most of all."

Republican Senate President Chuck Morse said he's saddened by what's unfolded, but he believes Guinta's agreement with the FEC speaks for itself.

"I think this is all about preserving the trust in government," Morse said. "I think at this point, it would be in the public and Frank's best interest that he resign."

Guinta showed News 9 receipts and other account information that he said totaled about $100,000. He allowed reporters to view the paperwork but declined requests to make copies.

He insisted that the money, through investment and growth, ultimately exceeded the $355,000 he said he loaned to his campaign. The account was held in his parents' names.

"It didn't matter to me that my name wasn't on the account," Guinta said. "I knew that I had been contributing."

Guinta said he has no intention of retiring.

"I'm going to continue to focus on talking to people about this, showing people the documents and records proving I had this money going back to the '70s," he said.

The documents weren't enough to stop sanctions from the FEC, and political analyst Dean Spiliotes said Guinta is in a difficult spot moving forward.

"If he does stay, he'll end up being very isolated," Spiliotes said. "No one is going to work with him. Clearly, people are backing away from him already, so he's really kind of in a no-win situation at this point."

New Hampshire Republican Party chairwoman Jennifer Horn called the situation "seriously troubling" and has called a meeting Monday night with the GOP executive committee and a representative of Guinta's to discuss the issue.